Conjoining a highway red-bed soft rock roadbed engineering structure in south Hunan, a corresponding disintegration steady fate value was proposed.

• 研究结果表明：基于质量的分形分布模型能较好地描述岩石崩解破碎过程中粒度的分布特征，其分维数可作为判断红层软岩崩解完成与否的控制指标。